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Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!husc6!necntc!ames!styx!twg-ap!narayan
From: narayan@twg-ap.UUCP
Newsgroups: comp.unix.wizards
Subject: Re: copyin
Message-ID: <157@twg-ap.UUCP>
Date: Tue, 10-Mar-87 19:26:54 EST
Article-I.D.: twg-ap.157
Posted: Tue Mar 10 19:26:54 1987
Date-Received: Wed, 11-Mar-87 20:42:13 EST
References: <4838@brl-adm.ARPA>
Organization: The Wollongong Group Inc., Palo Alto, CA
Lines: 32
Summary: copyin not done

In article <4838@brl-adm.ARPA>, Conley%csvax.cs.ukans.edu@RELAY.CS.NET writes:
> system: 780, 4.3
> 
> "Gotta do a copyin".
> 
> Dispensing with what we do ( and don't! ) know about the u area, kernel
> ....
>
> Would anyone care to shed some light on this?

This would work on a VAX where the kernel address space begins with the
high order bit turned on. But if you go to some other machine where
it is not possible to distinguish between kernel space and user space,
then this string will be treated to be in the kernel area. They you
may crash and burn. You really need to to do a uchar(I think) not
a copy in to load the string in (after setting u.u_xxx).
-- 

Narayan Mohanram

Phone:		415-962 7170
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